For Shop Owners

P0140 GMC - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Rear Heated Oxygen Sensor Bank 1
  • Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks
What does this mean?

Tech notes

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.
What does this mean?
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Posted and Edit by kvjournal.ru 04-12-2017